---
product_id: 8376872
title: "9003E e-Series Single Circuit On/Off Compact Battery Switch, 32V DC, 325A, Red"
brand: "blue sea systems"
price: "R1279"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Blue Sea Systems"
url: https://www.desertcart.co.za/products/8376872-9003e-e-series-single-circuit-on-off-compact-battery-switch
store_origin: ZA
region: South Africa
---

# Tactile switch for no-light use 325A heavy-duty current rating Compact & versatile mounting 9003E e-Series Single Circuit On/Off Compact Battery Switch, 32V DC, 325A, Red

**Brand:** blue sea systems
**Price:** R1279
**Availability:** ✅ In Stock

## Summary

> 🔴 Switch smart, power strong — never miss a beat on the water or road!

## Quick Answers

- **What is this?** 9003E e-Series Single Circuit On/Off Compact Battery Switch, 32V DC, 325A, Red by blue sea systems
- **How much does it cost?** R1279 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/8376872-9003e-e-series-single-circuit-on-off-compact-battery-switch)

## Best For

- blue sea systems enthusiasts

## Why This Product

- Trusted blue sea systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engine Room Ready:** Ignition protected for safe installation even in gasoline engine compartments.
- • **Operate Blindfolded:** Tactile textured knob lets you switch on/off easily in low or no light conditions.
- • **Power Through with Confidence:** Handles up to 325 amps for robust marine and RV power management.
- • **Fits Anywhere, Installs Everywhere:** Compact design with multiple mounting options for tight or tricky spaces.
- • **Secure Connections, Zero Resistance:** One-piece tin-plated copper studs accept multiple cables and ensure minimal power loss.

## Overview

The Blue Sea Systems 9003E e-Series Single Circuit Battery Switch is a compact, ignition-protected rotary switch rated for 32V DC and 325A continuous current. Designed for marine and RV applications, it offers versatile mounting options, tactile controls for low-light operation, and robust copper studs that accept multiple cables for secure, low-resistance connections. Ideal for isolating or combining battery banks, it ensures reliable power management in tight spaces and harsh environments.

## Description

A compact battery switch that offers multiple installation options. Switches isolated battery banks to all loads or combines battery banks to all loads. Blue Sea Systems e-Series battery switches can be installed in a variety of locations. Their compact footprint and two mounting options make installation easy. They are ignition protected and can be located in the engine rooms of gasoline powered boats. This version does not include an alternator field disconnect to protect the alternator diodes from damage if the switch is accidently turned to the OFF position while the engine is running. The tactile texture of the switch face and knob allow operation by feel in low or no light situations. The one piece tin-plated copper terminal studs are long enough to accept multiple cables and will accept the torque required to create a secure connection that minimizes resistance.

Review: Quality product - Used these on the solar system in my travel trailer. Works great to isolate and test / charge batteries individually.
Review: Great fit and easy confident switching. - This is the perfect switch I need to add the second battery to my pontoon boat. Strong lugs and easy to mount securely. Slots make it easy to route the cables cleanly, too.

## Features

- Compact design makes installation in tight places easy
- Multiple mounting options; can be installed on the surface or rear of the panel
- Ignition protected and can be mounted in the engine room of gasoline powered boats
- One piece copper studs are 7/8" long and accept multiple cables
- Tactile textures on face let operate the switch in low or no light

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000MMC914 |
| Actuator Type | Rotary |
| Best Sellers Rank | #7,123 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Boat Battery Switches |
| Brand | Blue Sea Systems |
| Circuit Type | 1-way |
| Color | Red |
| Compatible Devices | Boat lights, Boat horns, Other marine electrical devices |
| Connectivity Protocol | X-10 |
| Connector Type | Idc |
| Contact Material | Stainless Steel |
| Contact Type | Normally Open |
| Control Method | Touch |
| Control Type | On/Off |
| Controller Type | Ring |
| Current Rating | 1 Microamps |
| Date First Available | October 1, 2001 |
| Department | 0.00 |
| Global Trade Identification Number | 00632085900359 |
| International Protection Rating | IP66 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.3 pounds |
| Item dimensions L x W x H | 2.9 x 6.38 x 8.63 inches |
| Item model number | 9003e |
| Lower Temperature Rating | 1 Degrees Celsius |
| Manufacturer | Blue Sea Systems - Sports |
| Mounting Type | Panel Mount |
| National Stock Number | 5930-01-543-3693 |
| Number of Items | 1 |
| Number of Positions | 1 |
| Operating Voltage | 48 Volts |
| Operation Mode | ON-OFF-ON |
| Product Dimensions | 2.9 x 6.38 x 8.63 inches |
| Terminal | Spdt |
| UPC | 632085900359 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 1 Degrees Fahrenheit |
| Vehicle Service Type | Marine Boat |
| Wattage | 16800 watts |

## Product Details

- **Brand:** Blue Sea Systems
- **Connector Type:** Idc
- **Contact Type:** Normally Open
- **Current Rating:** 1 Microamps
- **Item dimensions L x W x H:** 2.9 x 6.38 x 8.63 inches
- **Material:** Plastic
- **Operating Voltage:** 48 Volts
- **Operation Mode:** ON-OFF-ON
- **Switch Type:** Temperature Switch
- **Terminal:** Spdt

## Images

![9003E e-Series Single Circuit On/Off Compact Battery Switch, 32V DC, 325A, Red - Image 1](https://m.media-amazon.com/images/I/81oD4fs1tCL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Questions & Answers

**Q: I'm considering using this as a battery isolator for a winch on my Jeep. Can it handle the current? and what are the physical dimensions?**
A: Your winch maker will list amperage for various amounts of load.  Also switches will show three amperages they can tolerate for different amounts of time.  So this switch is rated for 350 amps "continuous" (ie on for hours or permanently) 600 amps "intermittent" (for five minutes according to specs), and 1,200 amps "cranking"/peak for 30 seconds. OK so my SmittyBilt 9500 XRC Generation 3 winch has the following draws:  80 amps pulling zero lbs (winding rope in),  160 amps pulling 2,000 lbs, 220 amps pulling 4,000 lbs,  280 amps pulling 6,000, 340 amps pulling 8,000 lbs, and 385 amps pulling maximum of 9,500 lbs. H20 smitty and Second Gen XRC smitty use about 10% more amps. Also you "should" have a safety margin of 20%, ie no more than 80%. Now that means switch is ok continious running my winch are 2/3 of max load,  and switch is fine running extreme max of winch load five minutes, five minutes rest, five minutes run, etc. BUT if you are anywhere over 50% of winch capacity/load  you are going to run winch five minutes and rest the winch for five minutes anyway. so if your numbers are like mine you are ok. Check your winch makers specs on their website. Look until you find all numbers for the range of loads since the basic single amperage number they will list will be about 60% of max.  I would say 90% of up to 12,000 lb winches are ok with this switch. But that presupposes you have at least read up on winching and know that you will damage your winch if you pull at max for more than four or five minutes. goodluck. PS blue sea's web page lists the contentious, intermittent five minutes and peak 20 seconds for all its switches. The other red "m" model is 300 continuous, this "E" is 350 continuous, and the gray one is 600, 900,1750

**Q: where can I get wiring instructions with diagram?**
A: You tube has a few I found helpful.

**Q: Package says it’s compatible with up to 4/0 awg. my batter bank is 200a lithium tuning through 2/0 awg wire to my bus bar. will this switch work?**
A: It is compatible with any wire that fits the terminals. AWG 4, 2, or 0. The important thing is the current and voltage. At 48 volts this switch should be good at 233 amps continuously.  Here is my complete review: Fabulous switch. I have mine on my golf car and switch between two 48 volt battery banks; It is specified at Continuous rating: 350A, Maximum voltage: 32V DC. Doing the math: Power = Current x Voltage. Thus, 350 x 32 = 11,200 Watts that this switch can handle. So, 11,200 / 48 = 233 Amps continuous ... at 48 volts this switch should be good at 233 amps continuously. see less

**Q: What is alternator field disconnect vs the regular product without AFD? Looking to use on a camp trailer.**
A: You do not need afd on a trailer, only on a vehicle with an alternator such as a motorhome or boat. It protects the alternator diodes upon disconnect.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality product
*by T***N on January 21, 2026*

Used these on the solar system in my travel trailer. Works great to isolate and test / charge batteries individually.

### ⭐⭐⭐⭐⭐ Great fit and easy confident switching.
*by D***G on December 30, 2025*

This is the perfect switch I need to add the second battery to my pontoon boat. Strong lugs and easy to mount securely. Slots make it easy to route the cables cleanly, too.

### ⭐⭐⭐⭐⭐ Accessable From Any Side, Easy to Turn
*by K***A on June 25, 2025*

Excellent product. After having long thought that Perko was the gold standard in marine accessories, I took a chance and changed brands when the sea air had finally given my battery switch all it could take. I am very happy with my choice. Functionally, they are all pretty much the same. The difference for me was, since the unit is open on all 4 sides and not just the bottom, routing your wires is very easy. The switch is also physically easier to turn than the one I took out ( which is good on those bad arthritis pain days).

## Frequently Bought Together

- Blue Sea Systems 9003E e-Series Battery Switch, On/Off, Red
- Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover
- 16 Gauge Marine Wire 16 AWG Marine Grade Wire Include 16AWG 120FT Red & 120FT Black,16 Gauge Tinned Copper Electrical Cable for Boat Automotive Speakers Lighting Solar Outdoor RV Camper Trailer

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-13*